Negative spot market prices and battery dimensioning
What impact do many hours of negative spot market prices on sunny days have on the electricity sales of a GEMINI next generation house? What battery sizing?
We have no saleable prices for 17 hours today, Sunday, September 21, 2025. SpottyEnergie deducts 1.5 cents per kWh as a handling fee when selling electricity. 1 cent minus 1.5 cents is minus 0.5 cents, i.e. self-harm, if you sell electricity at that price.
But only on Friday there was a record price of 40.92 cents/kWh. These insane price fluctuations are due to the extreme sabotage of the energy transition in September 2014: "We don't need electricity storage for the energy transition for another 20 years".
I will make the untested assumption that 80 GW of photovoltaics and 80 GWh of batteries would make the electricity mix cleaner than 101 GW of photovoltaics. The basis of this thesis is the difference in efficiency between power plants that are optimized for constant production and run evenly, compared to peak load power plants that have a poor efficiency during rapid load changes.
It's like advertising "Our new diesel engine has 45% efficiency". With constant load changes in the city, not even 15% remains.
Right now at 09:00 https://app.electricitymaps.com/zone/DE/72h/hourly shows 4.73 GW of coal-fired power plants. How many GW nuclear power plants have been shut down in Germany in recent years and in some cases willfully destroyed?
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Simulation of batteries and mains connection
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But today it's not about general observations on the crazy energy system in Germany, but about the effects on the GEMINI next generation house. What impact do many hours of negative spot market prices on sunny days have on the house's electricity sales?
The EU Photovoltaic Information System only has hourly data up to the end of 2023, but it is interested in the situation in 2025, which differs considerably from 2024. Simplified assumptions therefore had to be made for the simulation: No electricity sales are possible between 09:00 and 15:00. Because it is summer time, this would be from 10:00 to 16:00. 6 hours of no electricity sales possible every day is a very harsh assumption. There are a few days when it gets much worse, see the 17 hours today, Sunday, but usually there are fewer hours with prices that are too low.
The simulation does not take self-consumption into account, it is only about photovoltaics, battery, dimensioning of the power connection and how much of the solar power can be fed in from 15:00 in the afternoon to 09:00 in the morning.
In terms of self-consumption, it would be possible to charge the car and operate the heat pumps during off-peak times.
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Grid dimensioning can be drastically reduced
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Until now, a 20 kW power connection for 53 kW peak photovoltaics was planned for the prototype. But even the 17 kW connection with the 140 kWh battery only feeds 394 kWh less into the grid, less than 1% of the total amount of electricity fed into the grid.
Of course, at first glance, with the 43 kW connection, a GEMINI house could make €17 in an hour tonight, but such peaks are rare and every kW of electricity connection costs money. Not only for the installer of the electricity connection, otherwise the grid fees would not rise so rapidly.
It's not about setting records, but about making the best possible use of resources: Which combination of battery and mains connection will deliver the best performance over the years?
Only 32% of installed peak photovoltaic output is sufficient for grid connection! All those who suffer from excessive grid fees should raise this as a protest.
Slush comes from Finland and is an event where investors and start-ups meet. The next regional event is in Zagreb.
Bits and Pretzels is a similar event in Munich.
It is very likely that I will meet more investors in the next two weeks than I have in the past two years. The endless nightmare of having an earth-shattering idea but not being able to raise the necessary capital could soon be over. So buy shares quickly now to strengthen my negotiating position and, of course, because if I close deals with larger investors, the share price will rise dramatically.
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MIA - Mission Innovation Austria
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We will be presenting a poster at the central annual meeting for the energy transition in and from the regions October 7-9, 2025 | forumKloster, Gleisdorf.
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The net-zero emissions mentality
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Net zero emissions means reducing greenhouse gas emissions to a level that nature can supposedly absorb for a long time. For the rich, this means Maintain poverty, cause poverty, so that enough emission rights remain for the rich. See the architect and her opinion that Africans don't need roads.
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The planetary restoration mentality
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Planetary cleanup back to 350 ppm CO2 means about 47,000 TWh of electricity to filter 1 ppm CO2 from the atmosphere and recycle it into carbon and oxygen. Who can afford that? Only a rich human race, 10 billion people in prosperity can do it. One million km² of energy-optimized settlement areas alone should contribute 150,000 TWh for the necessary electricity for world-wide prosperity and planetary restoration.
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GEMINI next Generation AG will prove the contrary
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It's not about whether the shares will be worth 100 times or 1000 times more in 20 years' time or whether they will only be worth a few cents. It's about the future of us all. Will there be a big showdown between eco-fascism and yesterday's fossils, or will it be possible to overcome the deep divisions in society and inspire supporters of both sides to work towards a great new goal?
Global prosperity and planetary restoration instead of saving, restricting, renouncing and climate catastrophe or peak oil and a little more climate catastrophe. Both sides must be convinced that they have no solution that is even remotely viable.
On the one hand, it must be shown that net-zero emissions are a completely inadequate target and that the goal must instead be a planetary clean-up back to 350 ppm CO2. The other side must be shown that solar power enables a higher standard of living than fossil energy.
It's about survival! The social situation in 2025 compared to 2005, extrapolated to 2045, makes for a horror world! If we are successful and your shares are worth 100 times more, this is just an addition to all the other achievements.
One new shareholder said "Me with my very modest investment", but €400 times €1,000 is also €400,000 for all investments up to the creation of the prototype.
There is a reward program for recommending the share to others. Two of the new shareholders have become shareholders through this reward program.
Here are the details.
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GEMINI shares: time to buy - milestones
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The situation has changed fundamentally since this company visited Slovakia. Necessary investment volume reduced by around 90%. Time to marketable product shortened by around one year. The 90% reduction in investment volume also means that each shareholder has significantly more shares.
The share price is now lifted towards our targets at each milestone. These milestones can happen in all areas: Financial, new shareholders, new opportunities to attract new shareholders. Contracts to build the prototype, more houses and settlements. Cooperations for realization. Purchase, arrival and testing of important technical components. |
We have no saleable prices for 17 hours today, Sunday, September 21, 2025. SpottyEnergie deducts 1.5 cents per kWh as a handling fee when selling electricity. 1 cent minus 1.5 cents is minus 0.5 cents, i.e. self-harm, if you sell electricity at that price.
But only on Friday there was a record price of 40.92 cents/kWh. These insane price fluctuations are due to the extreme sabotage of the energy transition in September 2014: "We don't need electricity storage for the energy transition for another 20 years".
I will make the untested assumption that 80 GW of photovoltaics and 80 GWh of batteries would make the electricity mix cleaner than 101 GW of photovoltaics. The basis of this thesis is the difference in efficiency between power plants that are optimized for constant production and run evenly, compared to peak load power plants that have a poor efficiency during rapid load changes.
It's like advertising "Our new diesel engine has 45% efficiency". With constant load changes in the city, not even 15% remains.
Right now at 09:00 https://app.electricitymaps.com/zone/DE/72h/hourly shows 4.73 GW of coal-fired power plants. How many GW nuclear power plants have been shut down in Germany in recent years and in some cases willfully destroyed?
